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From "James Taylor (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (PHOENIX-2597) Local Indexes are not used to query views
Date Fri, 15 Jan 2016 02:14:39 GMT

     [ https://issues.apache.org/jira/browse/PHOENIX-2597?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

James Taylor updated PHOENIX-2597:
----------------------------------
    Attachment: PHOENIX-2597.patch

Please review, [~samarthjain].

> Local Indexes are not used to query views
> -----------------------------------------
>
>                 Key: PHOENIX-2597
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-2597
>             Project: Phoenix
>          Issue Type: Bug
>    Affects Versions: 4.4.0, 4.7.0
>            Reporter: Pedro Gandola
>             Fix For: 4.7.0
>
>         Attachments: PHOENIX-2597.patch
>
>
> I've noticed that Phoenix (using version 4.4) when querying a view it does not consider
the original table local indexes to optimise the query.
> If I explain my query over the original table it's using the local index properly:
> {code:sql}
> EXPLAIN SELECT * FROM BIDDING_EVENTS WHERE wTs IS NOT NULL;
> CLIENT 300-CHUNK PARALLEL 300-WAY RANGE SCAN OVER _LOCAL_IDX_BIDDING_EVENTS [-32768]
>      SERVER FILTER BY "WTS" IS NOT NULL
> {code}
> However, If I create a view using the exact same query and explain I get a full scan.
> {code:sql}
> CREATE VIEW WINS_VIEW AS SELECT * FROM BIDDING_EVENTS WHERE wTs IS NOT NULL; 
> EXPLAIN SELECT * FROM WINS_VIEW;
> CLIENT 300-CHUNK PARALLEL 1-WAY FULL SCAN OVER BIDDING_EVENTS
>      SERVER FILTER BY WTS IS NOT NULL
> {code}
> Version 4.7-SNAPSHOT is affected as well.



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